Lesson 3 angle between two intersecting lines
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The document discusses how to find the angle between two lines that intersect. It provides examples of finding the angle between lines defined by two points each and discusses how to determine the angle when additional information is given, such as one line making a 45 degree angle and one having a specific slope. It also gives an example of finding the interior angles of a triangle given the coordinates of its vertices.
Lesson 3 angle between two intersecting lines
- 1. ANGLE BETWEEN TWO INTERSECTING LINES Prepared by: Prof. Teresita P. Liwanag – Zapanta B.S.C.E., M.S.C.M., M.Ed. (Math-units), PhD-TM (on-going)
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- 4. Examples: 2.The line through the points (-1, 6) and (5, -2) intersects the line through (4, -4) and (1,7). Determine the angle between these two intersecting lines. 3.The angle from the line through (x, -1) and (-3, -5) to the line through (2, -5) and (4, 1) is 45 . Find x. 4.Two lines passing through (2, 3) make an angle of 45 . If the slope of one of the lines is 2, find the slope of the other. 5.Find the interior angles of the triangle whose vertices are A (-3, -2), B (2, 5) and C (4,2).